JP2010202564A - Dichloroisocyanuric acid tablet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dichloroisocyanuric acid tablet releasing quickly high-concentration active chlorine immediately after coming into contact with water, and continuously releasing low-concentration active chlorine over a long period of time after ending the release of the high-concentration active chlorine. <P>SOLUTION: The dichloroisocyanuric acid tablet is to be used, which is such that an alkali metal salt of dichloroisocyanuric acid and sodium metaphosphate are compounded together. In the dichloroisocyanuric acid tablet, the compounding proportion of the alkali metal salt of dichloroisocyanuric acid is 30-80 wt.%, while that of the sodium metaphosphate 1-30 wt.%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tablet containing an alkali metal dichloroisocyanurate as an active ingredient, and releases a high concentration of active chlorine in an initial short period by contact with water, followed by a low concentration of activity. It has the effect of releasing chlorine over a long period of time.

  A chlorinated isocyanuric acid compound is a chemically stable solid compound that is easy to handle. When contacted with water, it hydrolyzes to release active chlorine having a strong oxidizing ability. In addition, since it has excellent stability of active chlorine in water, it is widely used as an active ingredient such as a bleaching agent, a bactericide, and a deodorant.

In recent years, the use of chlorinated isocyanuric acid compounds includes tank cleaners that are installed in the drainage strainer of the kitchen or installed in the tank of the flush toilet or in the hand-washing water receiver at the top of the tank. It is done.
For example, scales and organic stains adhere to the drainage strainer in the kitchen, so that various germs and the like propagate and cause slime and mold. Since such slime and mold are extremely unpleasant and unsanitary, application of chlorinated isocyanuric acid compounds as a slime and mold remover, generation inhibitor, and bleaching agent has been studied.

  In Patent Document 1, a tablet mainly composed of trichloroisocyanuric acid is placed in a net-like sachet, and this is placed on the bottom surface of the strainer and brought into contact with drainage, thereby releasing active chlorine and draining part of the sink. A method of purifying the water has been proposed. However, since trichloroisocyanuric acid has low solubility in water and the concentration of active chlorine eluted in the wastewater is low, it exhibits an excellent effect in preventing the occurrence of slime. It was scarce. Moreover, although the effect which inhibits growth of mold | fungi was exhibited, the effect which bleached the darkening by the mold once grown was scarce.

  Patent Document 2 proposes a tablet containing trichloroisocyanuric acid and sodium dichloroisocyanurate hydrate. However, when the tablet is brought into contact with water, the sodium dichloroisocyanurate hydrate dispersed and contained in the tablet surface dissolves rapidly, but the sodium dichloroisocyanurate contained dispersed in the tablet is contained. Hydrate is inhibited from dissolution by trichloroisocyanuric acid, which has low solubility. Therefore, immediately after the start of use, there is a difficulty in that active chlorine having a concentration high enough to remove slime cannot be released. In addition, since sodium dichloroisocyanurate hydrate is preferentially dissolved, when the tablet is disintegrated and used in a flush toilet tank, the tablet may clog at the tank outlet.

JP-A-6-306906 Japanese Patent Laid-Open No. 5-43407

  In the present invention, immediately after contact with water, a high concentration of active chlorine is quickly released, and after the release of the high concentration of active chlorine is completed, a low concentration of active chlorine is continuously released over a long period of time. An object is to provide a tablet that can be used.

As a result of intensive studies and studies to solve the above-mentioned problems, the present inventor can achieve the intended purpose by using sodium metaphosphate as a dissolution regulator together with an alkali metal salt of dichloroisocyanuric acid. As a result, the present invention has been completed.
That is, the first invention is a dichloroisocyanuric acid tablet containing an alkali metal dichloroisocyanurate and sodium metaphosphate, wherein the content of the alkali metal dichloroisocyanurate is 30 to 80% by weight, It is a dichloroisocyanuric acid tablet characterized by having a content ratio of 1 to 30% by weight.
2nd invention contained the organic acid and the fatty acid in the ratio of 10 to 60 weight% and 0.1 to 10 weight% in the dichloroisocyanuric acid tablet, respectively, The dichloro of 1st invention characterized by the above-mentioned Isocyanuric acid tablets.

  The dichloroisocyanuric acid tablet of the present invention quickly releases a high concentration of active chlorine immediately after contact with water, and continues to release a low concentration of active chlorine for a long time after the release of the high concentration of active chlorine is completed. Can be released across.

Hereinafter, the present invention will be described in detail.
Typical examples of the alkali metal dichloroisocyanurate used in the practice of the present invention include sodium dichloroisocyanurate and potassium dichloroisocyanurate. In addition, as a sodium dichloroisocyanurate and potassium dichloroisocyanurate, the hydrate which has crystal water other than a normal anhydride can be used, You may use combining these.
The dichloroisocyanuric acid tablet of the present invention preferably contains 30 to 80% by weight of alkali metal dichloroisocyanurate. If the alkali metal dichloroisocyanurate is less than 30% by weight, the release of active chlorine at a high concentration in the initial short period is insufficient, and if it exceeds 80% by weight, the fast solubility increases but the sustainability decreases.

Sodium metaphosphate used as a dissolution regulator in the practice of the present invention acts as a paste. Immediately after contact with water, it is not wet and thickened, so it does not inhibit the dissolution of alkali metal dichloroisocyanurate in the tablet. Therefore, the dichloroisocyanuric acid alkali metal salt in the vicinity of the contact portion with water quickly dissolves in water and releases active chlorine. Thereafter, the sodium metaphosphate is in a wet thickened state and acts as a film that inhibits the contact between the tablet and water, thereby inhibiting dissolution of the tablet, that is, dissolution of alkali metal dichloroisocyanurate. As a result, the effect of releasing a low concentration of active chlorine for a long time can be maintained.
The dichloroisocyanuric acid tablet of the present invention preferably contains 1 to 30% by weight of sodium metaphosphate. When sodium metaphosphate is less than 1% by weight, contact between the tablet and water is not sufficient, and when it exceeds 30% by weight, it tends to adhere to a mold or the like when the tablet is formed.

  The organic acid used in the practice of the present invention acts as a tablet dissolution regulator, and has a solubility in water of 0.5% by weight or more at 25 ° C. Examples of the organic acid include succinic acid, fumaric acid, citric acid, adipic acid, oxalic acid, L-ascorbic acid, tartaric acid, malonic acid, malic acid, lactic acid, benzoic acid, and the like. May be.

  The fatty acid used in the practice of the present invention acts as a lubricant to alleviate troubles during tableting, and examples thereof include magnesium stearate and calcium stearate.

  The tablet in the present invention is a molded product produced by a method in which a powder or granular raw material is filled in a mold and pressed (hereinafter sometimes referred to as tableting). When such a tablet is produced industrially, a known pressure type tableting machine composed of a die (usbori) and a pressure device is preferably used.

  As the above-mentioned pressurizing type tableting machine, a single-type tableting machine for tableting one tablet at a time, or a plurality of molds (mortars) are mounted along a rotating disk, and the raw material is filled during one rotation. In addition, a rotary tableting machine capable of continuously performing a series of operations such as pressure molding and tablet extraction can be used.

  The shape and size of the tablet of the present invention are not particularly limited, but are determined in consideration of handling convenience. Examples of the shape of the tablet include a cylindrical shape, a cube shape, and a rectangular parallelepiped shape. In the case of a cylindrical shape, it is practically preferable that the diameter is 5 to 100 mm, and also in the case of a cube or a rectangular parallelepiped shape, the long side (the longest side in a rectangular parallelepiped) is also the same. It is preferable that it is 5-100 mm.

Tablets in manufacturing the can of the present invention is preferably 100 to 300 / cm ² of about tableting pressure, if tableting pressure is less than 100 kg / cm ^2, the weak intensity of the molded tablets, handling or when When tablets are easily collapsed during transportation, and when the tablet is made higher than 300 kg / cm ^2, a phenomenon of capping or capping or laminating occurs when taking the tablet out of the mortar. It becomes easy to do.

As long as the object of the present invention is achieved, drugs other than those described above can be used in combination.
In the practice of the present invention, a surfactant may be used to enhance the cleaning effect.

  As the surfactant, conventionally known anionic surfactants, nonionic surfactants, cationic surfactants and zwitterionic surfactants can be arbitrarily employed.

  Examples of the anionic surfactant include carboxylic acid type anionic surfactants such as aliphatic monocarboxylate, polyoxyethylene alkyl ether carboxylate, N-acyl sarcosine salt, N-acyl glutamate, Dialkylsulfosuccinate, alkylsulfonate, alpha olefinsulfonate, linear alkylbenzenesulfonate, alkyl (branched) benzenesulfonate, naphthalenesulfonate-formaldehyde condensate, alkylnaphthalenesulfonate, N- Sulfonic acid type anionic surfactant such as methyl-N-acyl taurine salt, alkyl sulfate ester (alkyl sulfate), polyoxyethylene alkyl ether sulfate, fat and oil sulfate ester (sulfated oil) / castor oil sulfuric acid Sulfate-type shades such as chemical oil (funnel oil) On surfactant, alkyl phosphate, polyoxyethylene alkyl ether phosphates, phosphoric acid ester type anionic surface active agents such as polyoxyethylene alkyl phenyl ether phosphoric acid salts.

  Examples of the nonionic surfactant include fatty acid diethanolamide, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, glycerin fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester.

  Examples of the cationic surfactant include quaternary ammonium salts such as alkyltrimethylammonium chloride, alkyltriethylammonium chloride, dialkyldimethylammonium chloride, and alkylpyridinium chloride.

  Examples of the zwitterionic surfactant include alkyl carboxybetaines, alkylsulfoxybetaines, alkylamidohydroxysulfobetaines, alkylamidoamine type betaines, alkylimidazoline type betaines, and the like.

  When a surfactant is used, it is preferably contained in a proportion of about 0.001 to 1% by weight. By using a surfactant in combination, active chlorine can easily enter dirt, for example, the inside of the slime, thereby improving the peeling effect of the slime.

  A binder can be used to enhance the moldability of the tablet. The binder is not particularly limited as long as it has a function of binding solid particles and is preferably water-soluble. For example, carboxymethyl cellulose, sodium carboxymethyl cellulose, dextrin, polyethylene glycol, polyvinyl alcohol, polyalkylene glycol, lignin Examples include sulfonate, gum arabic, starches, and sucrose. By using an appropriate amount of these binders, the moldability of the tablet can be enhanced.

  As a method for improving the moldability of tablets other than those described above, means using a granulated alkali metal salt of dichloroisocyanuric acid is also effective.

  When the dichloroisocyanuric acid tablet of the present invention is used, since the active chlorine is contained in the waste water, the metal part of the pipe through which the waste water flows may corrode. In order to prevent this, a rust preventive agent can be contained.

  As anti-corrosion agents, conventionally known inorganic corrosion inhibitors such as nitrites, silicates and polyphosphates, and organic corrosion inhibitors such as carboxylic acids, metal soaps, sulfonic acids, amines, esters and phosphate esters And chelating compounds such as EDTA, gluconic acid, nitrilotriacetic acid, and the like. By using an appropriate amount of these rust inhibitors, corrosion of the metal can be suppressed.

  In order to color or scent the tablet of the present invention, a conventionally known dye, pigment or fragrance can be contained in the tablet. Riboflavin can be used as the dye. Riboflavin is a compound proposed by the applicant of the present invention as a yellow colorant having excellent oxidation resistance in Japanese Patent Application Laid-Open No. 2007-77202, and is 0.01 to 5% by weight depending on the desired degree of coloration. It can mix | blend in the ratio.

  Other bulking agents (excipients) that can be used include mirabilite, sodium chloride, alkali metal silicates, phosphates, and sulfates.

Around the kitchen sink and bathroom drains, and in the flush toilet puddles, food residue and scales adhere to the drainage, and there is adequate moisture, so that germs and molds propagate, and the area around the drains and drains. Slime is generated inside the pipe connected to the mouth. Numery is a collection of microorganisms such as germs and molds and slimy sticky substances that are produced when they are propagated. It is effective to kill microorganisms that live in the slime. On the other hand, in order to prevent the occurrence of slime, it is sufficient that a low concentration of active chlorine is present at the place where the slime occurs.
The isocyanuric acid tablets of the present invention are quickly placed in the drainage of kitchen sinks and bathrooms or inside and outside the toilet tank to quickly release high-concentration active chlorine into the wastewater, and subsequently low-concentration active chlorine. Can be released for a long time. Therefore, it is possible to remove the slime around the drainage outlet where the drainage flows and inside the pipe connected to the drainage, and to prevent the occurrence of slime. It can be suitably used as a cleaning agent. In addition, as a similar application, it is also useful as a disinfectant cleaner for kitchens such as sinks and drains used for removal and prevention of slime, and a disinfectant cleaner for bathrooms such as bathtubs and drains. It is a thing.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention in detail, this invention is not limited to these Examples. In addition, the raw material chemical | medical agent and evaluation test method which were used for the Example and the comparative example are as follows.

[Raw drug]
・ Sodium dichloroisocyanurate dihydrate: Trade name “Neochlor-55” (manufactured by Shikoku Chemicals), granule, effective chlorine content: about 55%
・ Sodium metaphosphate (made by Wako Pure Chemical Industries, reagent)
・ Fumaric acid (Wako Pure Chemical Industries, reagent)
・ Benzoic acid (Wako Pure Chemical Industries, reagent)
・ Succinic acid (made by Wako Pure Chemical Industries, reagent)
・ Magnesium stearate (made by Wako Pure Chemical Industries, reagent)

[Solubility test]
A resin net was placed on top of the resin box-shaped container, and a tablet was placed on the net. Water at 25 ° C. was passed through the tablet at a flow rate of 60 mL / second for 1 minute. This operation is performed at intervals of 10 minutes, and water accumulated in the container is extracted from the bottom every time water is passed, and the concentration of active chlorine contained in this water (effective chlorine conversion: mg / l (ppm)) is determined by the hypo titration method. It was measured. In addition, the weight of the tablet was measured.

[Examples 1-2]
Sodium dichloroisocyanurate dihydrate (abbreviated as DICD), sodium metaphosphate, fumaric acid, and magnesium stearate were mixed so as to have the composition shown in Table 1 to prepare a composition.
20 g of the composition was put into a tableting die, and then a punch paired with the die was set in a pressurizer, and tableting was carried out at a pressure of 200 kg / cm ^{2 to} form a cylindrical tablet (diameter 37 mm , Thickness 12 mm) was prepared and a solubility test was performed. The obtained test results were as shown in FIGS.

[Examples 3 to 4]
In the same manner as in Example 1, tablets having the compositions shown in Table 1 were prepared and subjected to a solubility test. The test results obtained were as shown in FIGS.

[Comparative Example 1]
Except not using sodium metaphosphate, the tablet which has the composition of Table 1 was prepared like Example 1, and the solubility test was done. The obtained test results were as shown in FIGS.

[Comparative Example 2]
Except not using sodium metaphosphate, the tablet which has the composition of Table 1 was prepared like Example 1, and the solubility test was done. The test results obtained were as shown in FIGS.

According to the results of the solubility test shown in the line graphs of FIGS. 1 to 4, in common with the cases of Examples 1 to 4, about several tens of times of water flow from immediately after the tablet and water contacted 10 to 10 Active chlorine at a high concentration of 40 ppm was eluted in water, and then the concentration of active chlorine decreased rapidly and became almost constant at a concentration of 2-3 ppm. Even when the number of water passes is 240 times, elution of low-concentration active chlorine continues.
On the other hand, in the case of Comparative Examples 1 and 2, active chlorine having a higher concentration of 30 to 60 ppm was eluted in the initial stage, but the active chlorine was not eluted by passing water 120 times.

Line graph showing transition of active chlorine concentration during dissolution test of tablets of Examples 1 and 2 and Comparative Example 1 Line graph showing weight transition during dissolution test of tablets of Examples 1 and 2 and Comparative Example 1 Line graph showing transition of active chlorine concentration during dissolution test of tablets of Examples 3 and 4 and Comparative Example 2 Line graph showing weight transition during dissolution test of tablets of Examples 3 and 4 and Comparative Example 2

Claims (2)

  A dichloroisocyanuric acid tablet containing an alkali metal dichloroisocyanurate and sodium metaphosphate, wherein the content of alkali metal dichloroisocyanurate is 30 to 80% by weight, and the content of sodium metaphosphate is 1 to 30% by weight. A dichloroisocyanuric acid tablet characterized by   The dichloroisocyanuric acid tablet according to claim 1, wherein the dichloroisocyanuric acid tablet contains 10 to 60% by weight and 0.1 to 10% by weight of an organic acid and a fatty acid, respectively.

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